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Next Storm/Next Snow Forecast Discussion from the Cherrywood Observatory – February 12, 2019

This content was originally published by the Longmont Observer and is licensed under a Creative Commons license.

Forecast Discussion:

Before we look our drying forecast, let's look at our drying land. Figure 1 is the long term drought analysis. We are now in moderate drought. The Western U.S. has the drier land, but it will be receiving rainfall/snowfall for the next month or more.

Figure 2 is the surface map for today, and it IS still dry here. And warming up.

The longer range forecast:

Our next front comes in Thursday PM into Friday AM, but precipitation amounts seem to be in the coating to a dusting level (Figure 3).

The GFS in Figure 4 doesn't give Longmont measurable snow through Friday PM. Earlier today, this model gave us 6-8 inches of snow through the next 10 days, but the 10 day forecast in Figure 5 is now under 1 inch. Similarly, the long range for the snow after the weekend on Figure 3 was in the 4-8 inch region, now it is small amounts of daily snow for a while. Obviously, the models don't have this system figured out yet.

The longer range European hints at 8-9 inches falling here by the end of the month, but we'll take that one storm at a time.

Figure 1: The Palmer long-term drought conditions from NOAA.
Figure 2: The forecast surface map for Tuesday PM. From NCEP.
Figure 3: the graphical forecast for the next 10 days for Longmont, CO from weatherunderground.com
Figure 4: the forecast accumulated snow map from the GFS and weather5280.com for Colorado, through Friday PM.
Figure 5: the forecast accumulated snow map from the GFS and weather5280.com for Colorado, through the next 10 days.
Figure 6: The European model snowfall accumulation through the end of February from weatherbell.com

Current Weather

Mostly cloudy

Mostly cloudy

60°F

UV Index
2 Low
Pressure
30.1 Falling
Visibility
8 miles
Dewpoint
32 °F
Humidity
35%
Wind
ESE 3.5 mph
Gust
7.1 mph
Wind Chill
60 °F

Hourly Forecast

Today
4 PM
60°F
Showers
Today
5 PM
58°F
Showers
Today
6 PM
57°F
Cloudy
Today
7 PM
54°F
Cloudy
Today
8 PM
55°F
Intermittent clouds
Today
9 PM
52°F
Mostly cloudy w/ t-storms
Today
10 PM
50°F
Intermittent clouds
Today
11 PM
48°F
Intermittent clouds
Tomorrow
12 AM
47°F
Intermittent clouds
Tomorrow
1 AM
45°F
Intermittent clouds
Tomorrow
2 AM
45°F
Intermittent clouds
Tomorrow
3 AM
43°F
Intermittent clouds

7 Day Forecast

Mostly cloudy w/ showers

Tuesday

63 °F

Turning cloudy and cooler; a passing afternoon shower or two


Partly cloudy w/ t-storms

Tuesday Night

40 °F

An evening thundershower; otherwise, partly cloudy


Mostly sunny

Wednesday

76 °F

Pleasant and warmer with sunshine and patchy clouds


Partly cloudy

Wednesday Night

42 °F

Patchy clouds


Mostly cloudy w/ t-storms

Thursday

73 °F

Becoming cloudy; breezy in the afternoon with a thunderstorm in spots


Cloudy

Thursday Night

48 °F

Considerable cloudiness


Showers

Friday

69 °F

Mostly cloudy with a couple of showers


Thunderstorms

Friday Night

46 °F

Cloudy; thundershowers in the evening followed by periods of rain late


Showers

Saturday

53 °F

Cloudy and cooler with a couple of showers


Showers

Saturday Night

39 °F

Cloudy with occasional rain and drizzle late


Sunrise and Sunset

Sunrise
6:10 AM
Sunset
7:48 PM

Based on AccuWeather data